Home / 21,333.28-31,981.85-8,845.51

Finding the Fourth Proportional to 21,333.28, 31,981.85 and 8,845.51

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Solution

The fourth proportional to 21,333.28, 31,981.85 and 8,845.51 is: 13,260.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,333.28 : 31,981.85 = 8,845.51 : x
  2. Step 2: Convert to fraction form
    21,333.28/31,981.85 = 8,845.51/x
  3. Step 3: Cross multiply
    21,333.28x = 31,981.85 × 8,845.51
  4. Step 4: Simplify right side
    21,333.28x = 282,895,893.93
  5. Step 5: Solve for x
    x = 282,895,893.93/21,333.28
  6. Step 6: Final answer
    x = 13,260.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.